<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>文件上传</title>
    <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css">
</head>
<body>
<div id="app">
    <el-upload
            action="/upload"
            :on-preview="handlePreview"
            :limit="10">
        <el-button size="small" type="primary">点击上传</el-button>
        <div slot="tip" class="el-upload__tip">只能上传md类型文件，且不超过100MB</div>
    </el-upload>
</div>

<script src="https://unpkg.com/vue/dist/vue.js"></script>
<script src="https://unpkg.com/element-ui/lib/index.js"></script>

<script>
    new Vue({
        el:'#app',
        methods:{
            handlePreview(file){
                window.open(file.response.url);
            }
        }
    })

</script>

</body>
</html>